Which company owns MAC address prefix E4:FA:C4?

MAC address prefix E4:FA:C4 is registered to TP-Link Systems Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:FA:C4 has a network interface built by TP-Link Systems Inc.

What is the OUI E4:FA:C4?

E4:FA:C4 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TP-Link Systems Inc. It covers every address from E4:FA:C4:00:00:00 to E4:FA:C4:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-FA-C4.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E4:FA:C4:00:00:00 that is E4:FA:C4 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.

Where is TP-Link Systems Inc located?

TP-Link Systems Inc is listed at 5 Peters Canyon Rd Suit 300 Irvine CA SG 92606 in the IEEE OUI registry entry for E4:FA:C4. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does TP-Link Systems Inc own?

TP-Link Systems Inc holds 46 OUI prefixes in the IEEE registry, of which E4:FA:C4 is one. A device made by TP-Link Systems Inc could carry a MAC address from any of them.

TP-Link Systems Inc

MAC address prefix E4:FA:C4 is registered to TP-Link Systems Inc in the IEEE OUI registry. Any device whose MAC address begins with E4:FA:C4 has a network interface built by TP-Link Systems Inc. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address — it covers every MAC from E4:FA:C4:00:00:00 to E4:FA:C4:FF:FF:FF.

OUI prefix: E4:FA:C4
Hyphen form: E4-FA-C4
MAC range: E4:FA:C4:00:00:00 – E4:FA:C4:FF:FF:FF
Addresses in block: 16,777,216
Organization: TP-Link Systems Inc
Address: 5 Peters Canyon Rd Suit 300 Irvine CA SG 92606
Source: IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.

Other prefixes from TP-Link Systems Inc

TP-Link Systems Inc holds 46 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (4)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2023-07-11Assigned to "Big Field Global PTE. Ltd."
archived source →
2024-02-15Renamed from "Big Field Global PTE. Ltd." to "TP-LINK CORPORATION PTE. LTD."
archived source →
2025-05-13Renamed from "TP-LINK CORPORATION PTE. LTD." to "TP-Link Systems Inc"
archived source →
2026-07-17Assigned to "TP-Link Systems Inc"

Nearby in the registry

The prefixes assigned immediately before and after E4:FA:C4:

FAQ

Which company owns MAC address prefix E4:FA:C4?: MAC address prefix E4:FA:C4 is registered to TP-Link Systems Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:FA:C4 has a network interface built by TP-Link Systems Inc.
What is the OUI E4:FA:C4?: E4:FA:C4 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TP-Link Systems Inc. It covers every address from E4:FA:C4:00:00:00 to E4:FA:C4:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-FA-C4.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E4:FA:C4:00:00:00 that is E4:FA:C4 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.
Where is TP-Link Systems Inc located?: TP-Link Systems Inc is listed at 5 Peters Canyon Rd Suit 300 Irvine CA SG 92606 in the IEEE OUI registry entry for E4:FA:C4. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does TP-Link Systems Inc own?: TP-Link Systems Inc holds 46 OUI prefixes in the IEEE registry, of which E4:FA:C4 is one. A device made by TP-Link Systems Inc could carry a MAC address from any of them.